Place one of sliced jalapeno (or both halves if you really like spice!) in cocktail mixer and use muddler to smash it a few times to release oils (don’t overdo it unless you really like heat).
Add tequila, triple sec, agave nectar, and grapefruit, lime, and orange juices to mixer. Add one cup of ice, put lid on mixer, and shake well until mixed (about 10-15 seconds). Strain and pour over ice in glass with chile lime salted rim.
Chile lime salted rim: place salt, chile, and lime zest on a plate and mix until well combined. Wet rim of glass with lime juice and place rim down on salt mixture.
Leftovers & Storage: This margarita recipe can be made up to 3-4 days ahead of time, however make sure to strain and remove the jalapeno before storing or else you’ll be in store for a very spicy surprise!